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A set of utilities for Java
package org.rx.core;
import lombok.Getter;
import lombok.Setter;
import lombok.SneakyThrows;
import org.rx.util.function.TripleAction;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
@Getter
public final class StringBuilder implements Appendable, CharSequence, Serializable {
private static final long serialVersionUID = -5807000410250350182L;
final java.lang.StringBuilder buf;
@Setter
TripleAction preAppend;
public boolean isEmpty() {
return length() == 0;
}
public StringBuilder() {
buf = new java.lang.StringBuilder();
}
public StringBuilder(int capacity) {
buf = new java.lang.StringBuilder(capacity);
}
public StringBuilder(CharSequence seq) {
buf = new java.lang.StringBuilder(seq);
}
@Override
public int length() {
return buf.length();
}
public StringBuilder setLength(int length) {
buf.setLength(length);
return this;
}
@Override
public char charAt(int index) {
return buf.charAt(index);
}
public StringBuilder setCharAt(int index, char ch) {
buf.setCharAt(index, ch);
return this;
}
public int indexOf(String str) {
return buf.indexOf(str);
}
public int indexOf(String str, int fromIndex) {
return buf.indexOf(str, fromIndex);
}
public int lastIndexOf(String str) {
return buf.lastIndexOf(str);
}
public int lastIndexOf(String str, int fromIndex) {
return buf.lastIndexOf(str, fromIndex);
}
public StringBuilder insert(int offset, Object obj) {
buf.insert(offset, obj);
return this;
}
public StringBuilder insert(int offset, String str) {
buf.insert(offset, str);
return this;
}
public StringBuilder insert(int offset, String format, Object... args) {
return insert(offset, String.format(format, args));
}
public StringBuilder insert(int dstOffset, CharSequence s) {
buf.insert(dstOffset, s);
return this;
}
public StringBuilder insert(int dstOffset, CharSequence s, int start, int end) {
buf.insert(dstOffset, s, start, end);
return this;
}
public StringBuilder insert(int offset, boolean p) {
buf.insert(offset, p);
return this;
}
public StringBuilder insert(int offset, char p) {
buf.insert(offset, p);
return this;
}
public StringBuilder insert(int offset, int p) {
buf.insert(offset, p);
return this;
}
public StringBuilder insert(int offset, long p) {
buf.insert(offset, p);
return this;
}
public StringBuilder insert(int offset, float p) {
buf.insert(offset, p);
return this;
}
public StringBuilder insert(int offset, double p) {
buf.insert(offset, p);
return this;
}
public StringBuilder replace(String target, String replacement) {
int index = 0;
while ((index = buf.indexOf(target, index)) != -1) {
buf.replace(index, index + target.length(), replacement);
index += replacement.length(); // Move to the end of the replacement
}
return this;
}
public StringBuilder replace(int start, int end, String str) {
buf.replace(start, end, str);
return this;
}
public StringBuilder delete(int offset, int length) {
buf.delete(offset, offset + length);
return this;
}
public StringBuilder deleteCharAt(int index) {
buf.deleteCharAt(index);
return this;
}
@SneakyThrows
void preAppend(Object obj) {
if (preAppend == null) {
return;
}
preAppend.invoke(this, obj);
}
@Override
public StringBuilder append(CharSequence csq) {
preAppend(csq);
buf.append(csq);
return this;
}
public StringBuilder append(Object obj) {
preAppend(obj);
buf.append(obj);
return this;
}
public StringBuilder append(String str) {
preAppend(str);
buf.append(str);
return this;
}
@Override
public StringBuilder append(CharSequence csq, int start, int end) {
buf.append(csq, start, end);
return this;
}
@Override
public StringBuilder append(char p) {
buf.append(p);
return this;
}
public StringBuilder append(boolean p) {
buf.append(p);
return this;
}
public StringBuilder append(int p) {
buf.append(p);
return this;
}
public StringBuilder append(long p) {
buf.append(p);
return this;
}
public StringBuilder append(float p) {
buf.append(p);
return this;
}
public StringBuilder append(double p) {
buf.append(p);
return this;
}
public StringBuilder appendLine() {
buf.append(System.lineSeparator());
return this;
}
public StringBuilder appendLine(Object obj) {
preAppend(obj);
buf.append(obj);
return appendLine();
}
public StringBuilder appendFormat(String format, Object... args) {
return append(String.format(format, args));
}
public StringBuilder appendMessageFormat(String format, Object... args) {
appendArrayFormat(format, args);
return this;
}
//region arrayFormat;
static final char DELIM_START = '{';
static final String DELIM_STR = "{}";
static final char ESCAPE_CHAR = '\\';
void appendArrayFormat(final String messagePattern, final Object[] argArray) {
if (messagePattern == null) {
buf.append("null");
return;
}
if (argArray == null) {
buf.append(messagePattern);
return;
}
int i = 0;
int j;
buf.ensureCapacity(buf.length() + messagePattern.length() + 50);
int L;
for (L = 0; L < argArray.length; L++) {
j = messagePattern.indexOf(DELIM_STR, i);
if (j == -1) {
// no more variables
if (i == 0) { // this is a simple string
buf.append(messagePattern);
return;
} else { // add the tail string which contains no variables and return
// the result.
buf.append(messagePattern, i, messagePattern.length());
return;
}
} else {
if (isEscapedDelimeter(messagePattern, j)) {
if (!isDoubleEscaped(messagePattern, j)) {
L--; // DELIM_START was escaped, thus should not be incremented
buf.append(messagePattern, i, j - 1);
buf.append(DELIM_START);
i = j + 1;
} else {
// The escape character preceding the delimiter start is
// itself escaped: "abc x:\\{}"
// we have to consume one backward slash
buf.append(messagePattern, i, j - 1);
deeplyAppendParameter(buf, argArray[L], new HashMap<>());
i = j + 2;
}
} else {
// normal case
buf.append(messagePattern, i, j);
deeplyAppendParameter(buf, argArray[L], new HashMap<>());
i = j + 2;
}
}
}
// append the characters following the last {} pair.
buf.append(messagePattern, i, messagePattern.length());
}
static boolean isEscapedDelimeter(String messagePattern, int delimeterStartIndex) {
if (delimeterStartIndex == 0) {
return false;
}
char potentialEscape = messagePattern.charAt(delimeterStartIndex - 1);
return potentialEscape == ESCAPE_CHAR;
}
static boolean isDoubleEscaped(String messagePattern, int delimeterStartIndex) {
return delimeterStartIndex >= 2 && messagePattern.charAt(delimeterStartIndex - 2) == ESCAPE_CHAR;
} // special treatment of array values was suggested by 'lizongbo'
private static void deeplyAppendParameter(java.lang.StringBuilder sbuf, Object o, Map seenMap) {
if (o == null) {
sbuf.append("null");
return;
}
if (!o.getClass().isArray()) {
safeObjectAppend(sbuf, o);
} else {
// check for primitive array types because they
// unfortunately cannot be cast to Object[]
if (o instanceof boolean[]) {
booleanArrayAppend(sbuf, (boolean[]) o);
} else if (o instanceof byte[]) {
byteArrayAppend(sbuf, (byte[]) o);
} else if (o instanceof char[]) {
charArrayAppend(sbuf, (char[]) o);
} else if (o instanceof short[]) {
shortArrayAppend(sbuf, (short[]) o);
} else if (o instanceof int[]) {
intArrayAppend(sbuf, (int[]) o);
} else if (o instanceof long[]) {
longArrayAppend(sbuf, (long[]) o);
} else if (o instanceof float[]) {
floatArrayAppend(sbuf, (float[]) o);
} else if (o instanceof double[]) {
doubleArrayAppend(sbuf, (double[]) o);
} else {
objectArrayAppend(sbuf, (Object[]) o, seenMap);
}
}
}
private static void safeObjectAppend(java.lang.StringBuilder sbuf, Object o) {
try {
String oAsString = o.toString();
sbuf.append(oAsString);
} catch (Throwable t) {
sbuf.append("[FAILED toString()]");
}
}
private static void objectArrayAppend(java.lang.StringBuilder sbuf, Object[] a, Map seenMap) {
sbuf.append('[');
if (!seenMap.containsKey(a)) {
seenMap.put(a, null);
final int len = a.length;
for (int i = 0; i < len; i++) {
deeplyAppendParameter(sbuf, a[i], seenMap);
if (i != len - 1)
sbuf.append(", ");
}
// allow repeats in siblings
seenMap.remove(a);
} else {
sbuf.append("...");
}
sbuf.append(']');
}
private static void booleanArrayAppend(java.lang.StringBuilder sbuf, boolean[] a) {
sbuf.append('[');
final int len = a.length;
for (int i = 0; i < len; i++) {
sbuf.append(a[i]);
if (i != len - 1)
sbuf.append(", ");
}
sbuf.append(']');
}
private static void byteArrayAppend(java.lang.StringBuilder sbuf, byte[] a) {
sbuf.append('[');
final int len = a.length;
for (int i = 0; i < len; i++) {
sbuf.append(a[i]);
if (i != len - 1)
sbuf.append(", ");
}
sbuf.append(']');
}
private static void charArrayAppend(java.lang.StringBuilder sbuf, char[] a) {
sbuf.append('[');
final int len = a.length;
for (int i = 0; i < len; i++) {
sbuf.append(a[i]);
if (i != len - 1)
sbuf.append(", ");
}
sbuf.append(']');
}
private static void shortArrayAppend(java.lang.StringBuilder sbuf, short[] a) {
sbuf.append('[');
final int len = a.length;
for (int i = 0; i < len; i++) {
sbuf.append(a[i]);
if (i != len - 1)
sbuf.append(", ");
}
sbuf.append(']');
}
private static void intArrayAppend(java.lang.StringBuilder sbuf, int[] a) {
sbuf.append('[');
final int len = a.length;
for (int i = 0; i < len; i++) {
sbuf.append(a[i]);
if (i != len - 1)
sbuf.append(", ");
}
sbuf.append(']');
}
private static void longArrayAppend(java.lang.StringBuilder sbuf, long[] a) {
sbuf.append('[');
final int len = a.length;
for (int i = 0; i < len; i++) {
sbuf.append(a[i]);
if (i != len - 1)
sbuf.append(", ");
}
sbuf.append(']');
}
private static void floatArrayAppend(java.lang.StringBuilder sbuf, float[] a) {
sbuf.append('[');
final int len = a.length;
for (int i = 0; i < len; i++) {
sbuf.append(a[i]);
if (i != len - 1)
sbuf.append(", ");
}
sbuf.append(']');
}
private static void doubleArrayAppend(java.lang.StringBuilder sbuf, double[] a) {
sbuf.append('[');
final int len = a.length;
for (int i = 0; i < len; i++) {
sbuf.append(a[i]);
if (i != len - 1)
sbuf.append(", ");
}
sbuf.append(']');
}
//endregion
public StringBuilder appendLine(String format, Object... args) {
return appendLine(String.format(format, args));
}
@Override
public CharSequence subSequence(int start, int end) {
return buf.subSequence(start, end);
}
public String substring(int start) {
return buf.substring(start);
}
public String substring(int start, int end) {
return buf.substring(start, end);
}
@Override
public String toString() {
return buf.toString();
}
public String toString(int offset, int length) {
return buf.substring(offset, offset + length);
}
}